|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||Deformation Mechanism of Ultrafine-grained FeCrAl Alloy – An In Situ Micropillar Compression Strain Rate Jump Study
||Tianyi Sun, Jaehun Cho, Zhongxia Shang, Tongjun Niu, Jie Ding, Dongyue Xie, Jian Wang, Haiyan Wang, Xinghang Zhang
|On-Site Speaker (Planned)
FeCrAl alloy is one of the promising candidates for cladding materials in advanced nuclear reactors. In this study, a model FeCrAl alloy, C35M, was processed by surface mechanical grinding treatment. In situ micropillar compression tests revealed high flow stresses exceeding 1.44 GPa of the UFG FeCrAl alloy, and excellent work hardening ability at room temperature. In situ micropillar compression strain rate jump tests probed the underlying deformation mechanisms of UFG FeCrAl alloys at intermediate temperatures (T ~ 0.23 Tm). The activation energy for the dominant deformation mechanism was estimated considering the presence of a threshold stress, which suggests a grain boundary-diffusion-controlled deformation mechanism.
||Nuclear Materials, Iron and Steel, Mechanical Properties